The stopping potential `V` for photoelectric emission from a metal surface is plotted along Y - axis and frequency `v` of incident light along X - axis . A straight line is obtained as shown . Planck's constant is given by

Options

A. Slope of the line
B. Product of slope on the line and charge on the electron
C. Product of intercept along Y - axis and mass of the electron
D. Product of Slope and mass of electron

Answer

B

Explanation

`K_(max) = hv - hv_(0) rArr eV_(0) = hv - hv_(0) rArr V_(0) = (h)/( e) v - (hv_(0))/( e)`
Comparing this equation with `y = mx + c` , we get slope `m = (h)/( e) rArr h = m xx e`.